I don't see your Alexander family, but I think I do see Frank Masters, if that is any help.
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1880 GA Chatham Savannah, pg 355B
F. D. Masters, age 34, plumber, FL FL FL
Mary E., age 20, GA GA GA
Children are: Frank 5, Alice 3 and Fred 1.
In 1870 Frank is living alone in the same town, is age 25, a plumber, born FL.